Tropicos | Name - Catagonium Müll. Hal. ex Broth.

Bolivia Bryophytes > Catagoniaceae > Catagonium

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Catagonium Müll. Hal. ex Broth.

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Project Name Data (Last Modified On 2/9/2009)

Acceptance : Accepted

Notes (Last Modified On 10/14/2012)

general taxon notes:

Catagoniumis characterized by the soft glossy mats, leaves strongly complanate, appearing 2-ranked and oblong-ovate with short piliferous to mucronate or emarginate apices, subauriculate leaf bases and short, mostly forked or occasionally single costae. Sporophytes are extremely rare, not observed in Bolivia. Given the rather fragile nature of the stems and leaves, reproduction is likely asexual via propagula. Catagonium contains four species with a circum-Antarctica distribution, extending into the mountainous tropics; two species in the Neotropics (Lin 1984).

Catagonium se caracterizado por las matas brillantes y suaves, hojas marcadamente comprimidas, de apariencia 2-filas y oblongo-ovadas con ápices corto-pilíferos (C. brevicaudatum Müll. Hal.) hasta mucronados o emarginados (C. emarginatum S.H. Lin); con bases de las hoja subauriculadas y cortas, costa generalmente bifurcada y en ocasiones simple. Este género contiene cuatro especies.

Reference List (Last Modified On 10/14/2012)

Reference:

Lin, S. H. 1984. A taxonomic revision of Phyllogoniaceae (Bryopsida). Part II. J. Taiwan Mus. 37(2): 1–54.

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Plants small to somewhat medium sized, forming loose to dense soft mats, occasionally pendent, glossy green, yellowish-green to golden. Primary stems short, creeping, secondary stems spreading or pendent, 3–12 cm long, irregularly branched. Leaves complanate, appearing 2-ranked, ovate-oblong, conduplicate or deeply concave, 1.2–2 mm long, apex obtuse-rounded and short piliferous to mucronate or emarginate, tips often reflexed, base slightly auriculate; margins plane, entire; costae variable, absent or short, either forked or rarely single; median cells linear-vermicular, rather thick-walled, smooth; alar region undifferentiated. Dioicous. Perichaetia lateral. Setae elongate, to 9.5 mm long, smooth. [Capsules erect to inclined, urn oblong-cylindrical, 1.6–1.7 mm long, ± asymmetric, opercula short-rostrate; peristome double, exostome teeth 16, cross-striate below, papillose distally; endostome lightly papillose, basal membrane high, segments 16, keeled and perforate, cilia 1–3. Calyptrae cucullate, smooth and naked. Spores spherical, finely papillose.]

Plantas pequeñas hasta algo medianas, formando matas suave laxas hasta densas, rara vez pendientes, verde brillantes, verde-amarillentas hasta doradas. Tallos primarios cortos, reptantes, tallos secundarios patentes o pendientes, 3–12 cm de largo, 3 mm de ancho, irregularmente ramificados. Hojas comprimidas, en apariencia 2-filas, hasta 1.8 mm de largo, ovado-oblongas, conduplicadas o profundamente cóncavas, 1.2–2 mm de largo, ápice obtuso-redondeado y corto pilífero hasta mucronado o emarginado, extremos a menudo reflexos, base escasamente auriculads; márgenes planos, enteros; costa variable, ausente o corta, bifurcada o rara vez simple; células mediales lineo-vermiculares, lisas; región alar indiferenciada. Dioicas. Periquecios laterales. [Setas alargadas, hasta 9.5 mm de largo, lisas. Los esporofitos no han sido observados en Bolivia [Cápsulas erectas hasta inclinadas, urna oblongo-cilíndrica, opérculo corto-rostrado, peristoma doble. Caliptra cuculada, lisa y desnuda. Esporas esféricas, finamente papilosas.]